Prestige counting instruments, in collaboration with samson ag, germany, supplies self operated temperature controllers series 43. These temperature controllers are mainly used in large heating systems, heat exchangers and other heating installations.. The temperature controller is equipped with a control valve and a thermostat with set-value adjustment, capillary tube and a temperature sensor working on the absorption principle. The valve closes when the temperature rises. The salient features of the controllers include: self-operated p-controller requiring no auxiliary energy; temperature sensor for any desired fitting position, for high permissible excess temperature [50°c above the maximum value of the setting range] and designed for working pressures up to 25 bar; tight closing, single-seated valve with pressure balanced valve plug; and, specially suited for large heating systems. The self-operated temperature controller is ideal for liquid, gaseous media and steam.